– Top-line Data in Chemotherapy Experienced Patients to be Presented at Oncology Meeting in January 2014 – Additional Cohort in Chemotherapy Naive Patients Has Been Added to the Trial TARRYTOWN, N.Y., Dec. 6, 2013 (GLOBE NEWSWIRE) -- Progenics Pharmaceuticals, Inc., (Nasdaq:PGNX) an oncology company focused on developing innovative approaches to targeting and treating prostate cancer, today announced that it has completed enrollment of chemotherapy experienced patients in a Phase II trial to assess the anti-tumor activity and tolerability of its antibody drug conjugate, PSMA ADC in patients with metastatic castrate resistant prostate cancer (mCRPC). A total of 83 patients who had progressive disease despite treatment with at least one taxane containing chemotherapy received PSMA ADC. Based on the observations following treatment of the patients in the chemotherapy experienced cohort, Progenics has initiated treatment of a cohort of chemotherapy naive patients who have progressed on hormonal therapies. This cohort is now enrolling. Progenics expects that an additional 35 patients will be included in this chemotherapy naïve group. "PSMA ADC is the most advanced antibody drug conjugate in clinical development to treat prostate cancer," said Robert J. Israel, M.D., Executive Vice President, Medical Affairs. "Based on the data seen with PSMA ADC in chemotherapy experienced patients, we have decided to explore whether this compound can also benefit men in the less clinically advanced chemotherapy naïve setting." Topline data on the chemotherapy experienced cohort of the Phase II PSMA ADC trial will be presented at the American Society of Clinical Oncology's 2014 Genitourinary Cancers Symposium Meeting in San Francisco in January 2014. About PSMA ADC Prostate Specific Membrane Antigen, PSMA, a protein that is a validated biomarker of prostate cancer, is expressed on the surface of prostate cancer cells as well as on blood vessels supplying other solid tumors. PSMA ADC comprises a fully human monoclonal antibody selectively targeting PSMA linked to a chemotherapeutic drug. Using technology licensed from Seattle Genetics, Inc., the PSMA antibody is linked to monomethyl auristatin E, a compound that inhibits cell proliferation by disrupting the cellular "backbone" (i.e. microtubules) required for replication. The resultant antibody-drug conjugate attaches to the PSMA protein on the surface of prostate cancer cells and is designed to internalize into the cancer cell, release active anti-cancer drug, and destroy the malignant cell.